Just took out my new-to-me F5 for a spin last night (still waiting for my lens boards to come in for my 45N-2), and it was magic! I can't believe how smooth and stable and fun to use this camera is! Put a roll of 400 T-Max and went out around the industrial district at night. This thing focuses in near complete darkness, and fits my hands perfectly. Coming from a Canon F-1 it's not even a contest. I bet I gain at least one stop if not more because of the stability of the body and the smoothness of the shutter. I coupled it with a 50/1.8 I just picked up the same day.
Pics coming as soon as I get the roll developed and scanned. Can't wait!